Haybusa Parts and Service Member Support
« previous next »
Pages: [1]   Go Down

Author Topic: cut frame rails  (Read 10771 times)

Offline madracer3600

  • Rider
  • ***
  • Posts: 164
cut frame rails
« on: February 11, 2011, 11:39:15 AM »
looking for some specs and pics with no body work. How hard is it for diy?
Logged

Offline blk02ws6

  • Mad Post Whore
  • ******
  • Posts: 2373
  • Gender: Male
Re: cut frame rails
« Reply #1 on: February 11, 2011, 01:10:31 PM »
its not hard. a sawzall and a little sanding.

there is a step where the gas tank bolts on. your going to cut it flush with the stepped area.

sorry, dont have pics right now.
Logged

Offline sportbikeryder

  • OFF TOPIC
  • Universal Post Whore
  • **********
  • Posts: 7352
  • Gender: Male
Re: cut frame rails
« Reply #2 on: February 11, 2011, 05:46:58 PM »
Not mine, but a good way to do it :thumb:



Logged
Any day on a motorcycle like this that ends just needing parts and labor is a good day.
4.82, 158.67mph 1/8th mile 7.350, 200.32mph 1/4 mile Riding

4.392, 176.79mph 1/8th mile  6.610, 228.15mph 1/4 mile Tuning

Offline Kurt

  • Baconator
  • Mad Post Whore
  • ******
  • Posts: 2404
  • Gender: Male
Re: cut frame rails
« Reply #3 on: February 11, 2011, 06:35:01 PM »
same way I did mine





Logged

Offline madracer3600

  • Rider
  • ***
  • Posts: 164
Re: cut frame rails
« Reply #4 on: February 11, 2011, 10:07:18 PM »
just what i was looking for. Now if i could see some pics of how subframe attached to cut frame rails. I'm a no bar virgin! Thanks for all the help
« Last Edit: February 11, 2011, 10:11:55 PM by madracer3600 »
Logged

Offline Kurt

  • Baconator
  • Mad Post Whore
  • ******
  • Posts: 2404
  • Gender: Male
Re: cut frame rails
« Reply #5 on: February 11, 2011, 10:12:37 PM »
sent you some pics
Logged

Offline madracer3600

  • Rider
  • ***
  • Posts: 164
Re: cut frame rails
« Reply #6 on: February 12, 2011, 08:30:31 AM »
how much should your sixty foot improve by doing this mod?
Logged

Offline sportbikeryder

  • OFF TOPIC
  • Universal Post Whore
  • **********
  • Posts: 7352
  • Gender: Male
Re: cut frame rails
« Reply #7 on: February 12, 2011, 08:56:51 AM »
Quote from: madracer3600 on February 12, 2011, 08:30:31 AM
how much should your sixty foot improve by doing this mod?

Could be zero improvement. This modification doesn't directly impact a 60' time, it is an indirect modification. This allows (requires) the use of a lowered gas tank and tailsection for the cut frame. The rider is then lower and farther forward in the chassis making the center of gravity lower and farther forward.

If you have the power, gearing, and traction available to "turn the bike up", you should be able to leave harder without having teh front end lift. If you do not have any issues with the front end as is, this mod will likely provide very little change in your short time, other than that of the weight reduction from the cut frame and fiberglass tank.

Below is a picture of Ronnie Mitchel's bike, ridden by Bud Yoder. Note the seat area and talisection. Stock seating location is approximately where the step in the tailsection is.
John

Logged
Any day on a motorcycle like this that ends just needing parts and labor is a good day.
4.82, 158.67mph 1/8th mile 7.350, 200.32mph 1/4 mile Riding

4.392, 176.79mph 1/8th mile  6.610, 228.15mph 1/4 mile Tuning

Offline madracer3600

  • Rider
  • ***
  • Posts: 164
Re: cut frame rails
« Reply #8 on: February 12, 2011, 10:39:59 PM »
what i'm trying to accomplish is more rear wheel to undertail clearance. I feel like it is bottoming out killing my 60. i'm 225 unsuited. eight inches over. and the best 60 i had was 1.46. Is it a better way to do this or is extended subframe  the only way?
Logged

Offline sportbikeryder

  • OFF TOPIC
  • Universal Post Whore
  • **********
  • Posts: 7352
  • Gender: Male
Re: cut frame rails
« Reply #9 on: February 13, 2011, 07:36:22 AM »
Cutting the rails has no relation to rear tire clearance. You can modify your stock subframe, or get an aftermarket subframe that works with stock seat rails and use an aftermarket, extended tail. The way I check for tire contact is to put a few small pieces of electrical tape on the subframe directly above the tire. If the tire hits, the tape will be removed.

John
Logged
Any day on a motorcycle like this that ends just needing parts and labor is a good day.
4.82, 158.67mph 1/8th mile 7.350, 200.32mph 1/4 mile Riding

4.392, 176.79mph 1/8th mile  6.610, 228.15mph 1/4 mile Tuning

Offline madracer3600

  • Rider
  • ***
  • Posts: 164
Re: cut frame rails
« Reply #10 on: February 13, 2011, 08:04:18 AM »
i figured that if i was going to buy an aftermarket subframe and tail section that i might as well cut the frame rails because all the guys that are flying have it done. Don't want to spend the money for a extended subframe that bolts to stock frame rail and not be happy and have to spend the money twice.
Logged
Pages: [1]   Go Up
« previous next »